This site is a cooperative venture between ZooWeb and the
Wisconsin State Laboratory of Hygiene. These karyotypes are
intended for use in teaching, to help students study human
chromosomes. Copyright for these images remains with the
State Laboratory of Hygiene, apply to them for permission
for any other use than non-profit teaching.

Each karyotype is available in one of three forms:

The original unmodified smear. These may have extra
material, and often have some chromosomes crossed, which
makes them less useful for a class exercise in which
students cut apart and arrange the individual
chromosomes.

A copy of the original, with extraneous materials
removed, crossed chromosomes separated, and all
chromosomes separated slightly to faciliate cutting apart
of the chromosomes in a printed copy. This form is
intended for student use in an general biology
class.

A "key", with the chromosomes arranged in standard
order.

This page is still to a degree, under construction. There
are keys missing for some karyotypes. I hope to include more
information on each type soon. Please let me know if you
find any errors. For some hints on using these karyotypes in
teaching, click here.

So far, the following karyotypes are available. We hope
to continue adding more kinds as they become available.